Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Sun Sep 6 21:36:38 2026 Auto Mode Machine = Linux oleg404-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg404-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 3806 6310 207798 598110 64 8 5474 13605 576282 674790 64 16 4930 13120 1033216 725882 64 32 4989 60433 1330167 659861 64 64 7248 54144 1183548 1879725 128 4 4575 10667 313811 456986 128 8 4851 24339 586868 443033 128 16 12148 37816 1133103 914904 128 32 15773 73818 1243315 673778 128 64 12643 70025 1436229 1391557 128 128 16567 75692 1487977 2035099 256 4 5553 6314 378770 562520 256 8 8906 25580 855703 827989 256 16 14973 29210 587127 757326 256 32 16839 43797 1356067 741633 256 64 25770 108384 1354356 1142514 256 128 25214 41196 612235 1619994 256 256 26124 72093 1662639 2205688 512 4 9400 11236 628874 326325 512 8 6080 10436 934173 807383 512 16 15312 42060 533297 990168 512 32 6775 55225 1237168 986529 512 64 11458 39339 707152 1204552 512 128 20019 66700 857687 85961 512 256 32276 82434 1614885 1640796 512 512 35689 103369 1446306 2116152 1024 4 11726 5161 427198 147422 1024 8 8436 17685 860403 476487 1024 16 25750 32830 989440 177596 1024 32 23105 26357 1227903 522959 1024 64 35430 59621 1061060 704230 1024 128 40977 86515 959596 954266 1024 256 53057 96768 1239598 1496605 1024 512 60619 106554 838565 1014925 2048 4 5653 8114 314294 403798 2048 8 13586 16678 660012 152018 2048 16 13666 18478 358843 956583 2048 32 17098 33701 975263 771379 2048 64 27202 57807 1428131 774579 2048 128 30713 36137 591397 1280015 2048 256 27886 50616 896671 682889 2048 512 41237 62722 1216910 300296 4096 4 5252 5031 148276 332062 4096 8 12453 14107 436028 188520 4096 16 16698 22834 171094 281883 4096 32 28072 34473 424060 422225 4096 64 25312 37157 776217 953441 4096 128 53023 56945 925649 371113 4096 256 34193 57326 680611 815107 4096 512 32792 82594 1115807 534435 8192 4 2039 6448 335021 215137 8192 8 9145 11004 234130 313856 8192 16 16009 29114 499597 588877 8192 32 28151 31833 1147818 436553 8192 64 31128 44699 616453 266257 8192 128 42215 60902 971442 729416 8192 256 37715 71009 622969 340752 8192 512 42291 65190 731107 884174 16384 4 6469 6506 273595 235479 16384 8 13605 13850 486648 526800 16384 16 16792 19648 308080 299896 16384 32 17953 35248 453672 632567 16384 64 27556 41073 835578 405212 16384 128 37775 42166 527136 537194 16384 256 35087 49994 563141 759148 16384 512 37528 62982 1223227 676354 32768 4 6639 7507 245922 251009 32768 8 11286 11474 316660 401313 32768 16 15583 20963 646045 467786 32768 32 21595 33653 630070 495622 32768 64 30680 46830 696599 486597 32768 128 37149 41462 589925 702424 32768 256